JGOWorlds to explore

Trace a closed loop using the black and white pearls as clues.

Available External game
Open Pearl Discover the game
A turquoise loop and light and dark pearls on a midnight-blue grid beneath the Pearl title.

The game world

Discover Pearl

Connect neighbouring squares to form a single loop. Turn on every black pearl and continue straight on both sides of that turn. Go straight through every white pearl, then turn on at least one of its neighbouring squares along the route. Pearl is the version of Nikoli’s Masyu featured in Simon Tatham’s collection.

Original wordmark and artwork by JGO.

Your adventure starts here.

JavaScript and WebAssembly. The official site documents Chrome, Firefox, Safari and Edge.

Open Pearl